Do herb species matter in magick?

I'm making a magick summoning oil and don't know what species of the herbs I should be useing in general. Two herbs the oil recipe calls for are alder and birch, yet what species of them? Both of these herbs have one GENUS and one FAMILY yet there are multiple species within their genus and family. Example with alder do all species have the same power s/properties? Another example does (Pacific yew) raise the spirits of thee dead the same as (Common yew), its all yew but different species of it does it even matter? :'(

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